Bug#437321: xserver-xorg-video-ati: DRI enabled gives blank screen on Radeon Xpress 200M (RC410, 5a62)

[Marcus Better]

I seem to have the same problem with my Radeon XPRESS 200M (PCI ID 1002:5a42) 
on an LG LE50 Express laptop whenever DRI is not disabled in xorg.conf - 
except that the screen is garbled instead of blank. Power button or SysRq-B 
is needed to reboot.

This is with kernel 2.6.23-rc3 and xserver-xorg-video-ati 6.7.192-1.

Marcus

(Attached xorg.conf has DRI disabled again, otherwise it's identical.)
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# xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "Extensions"
	Option "Composite" "enable"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"se"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
EndSection

#Section "InputDevice"
#	Identifier	"Synaptics Touchpad"
#	Driver		"synaptics"
#	Option		"SendCoreEvents"	"true"
#	Option		"Device"		"/dev/psaux"
#	Option		"Protocol"		"auto-dev"
#	Option		"HorizScrollDelta"	"0"
#EndSection

Section "Device"
	Identifier	"ATI Technologies Inc RS400 [Radeon Xpress 200M]"
	Driver		"ati"
	BusID		"PCI:1:5:0"
	Option		"DRI" "off"
	Option		"monitor-VGA-0" "LG L1950SQ"
#	Option		"monitor-S-video" "TV Monitor"
#	Option		"monitor-LVDS" "Generic Monitor"
EndSection

Section "Monitor"
	Identifier	"LG L1950SQ"
	HorizSync 	30-83
 	VertRefresh 	56-75
	# 1280x1024 @ 60Hz (VESA) hsync: 64.0kHz 
#	ModeLine "1280x1024" 108.0 1280 1328 1440 1688   1024 1025 1028 1066 +hsync +vsync 
	# 1280x1024 @ 75Hz (VESA) hsync: 80.0kHz 
#	ModeLine "1280x1024" 135.0 1280 1296 1440 1688   1024 1025 1028 1066 +hsync +vsync 
	Option		"DPMS"
EndSection

Section "Monitor"
	Identifier	"Generic Monitor"
	Option		"DPMS"
EndSection

Section "Monitor"
	Identifier "TV Monitor"
	Option "Ignore" "true"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"ATI Technologies Inc RS400 [Radeon Xpress 200M]"
	Monitor		"Generic Monitor"
	SubSection "Display"
		Virtual 2304 1024
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
#	InputDevice	"Configured Mouse"
#	InputDevice	"Synaptics Touchpad"
EndSection